Memory Beta, non-canon Star Trek Wiki

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Memory Beta, non-canon Star Trek Wiki

"Return to Tomorrow" was the 51st episode of Star Trek: The Original Series.



Episode characters[]

Clifford Brent[1]Christine ChapelPavel ChekovBill HadleyHenochJames T. KirkRoger LemliRyan LeslieLeonard McCoyAnn MulhallZainab OdhiamboSargonMontgomery ScottSpockHikaru SuluThalassaNyota Uhuraunnamed USS Enterprise (NCC-1701) personnel
Referenced only 
Adam and Eve

Novelization characters[]

Christine ChapelHanochJames T. KirkLeonard McCoyM'BengaAnne MulhallSargonMontgomery ScottSpockHikaru SuluThalassaNyota Uhura

Starships and vehicles[]

USS Enterprise (Constitution-class heavy cruiser)
Referenced only 
Apollo 11


Arret (Arret system, the galaxy's Alpha or Beta Quadrants)
Referenced only 
Alpha CentauriEarthMars

Races and cultures[]


Materials and substances[]


Foods and beverages[]


Drugs and treatments[]

metabolic reduction injection

Science and medicine[]


Measurement and classification[]

body temperatureccclass M planetFahrenheitheart ratemetabolic ratemilestandard orbit


arteryheartlungmusclevital organ

Technology and weapons[]

androiddistress signal relayhumanoid robothypomicro-gearnegatron hydrocoilpulleyreceptaclescalpelstarshipsubspace radiotransportertricorder

Communications and tactics[]

diagramsubspace radio

States and organizations[]


Ranks and titles[]

captainchief engineerchief medical officercommanderconndoctorengineerensignfirst officerhelmsmanlieutenantlieutenant commandermedicine mannavigatorphysicianscience officersecond officertactical officertechnicianweapons officer

Other references[]

BonesclothingcommunicationenergyeuphoriaevolutiongalaxygovernmenthumanoidKirk in deathKirk's womenlanding partylifeformmattermeasurementmedicinememorynation-statenuclear age/nuclear eraplanetpoisonsciencespacetechnologytimeuniformuniverseweapon


Vulcan prehistory 
Mentioned by Spock.
stardate 4768.3, 2268 (2260s chronology, 2264–2270 Enterprise voyages
Enterprise travels to Arret.


Related media[]





published order
Previous episode:
By Any Other Name
TOS episode produced Next episode:
Patterns of Force
Previous episode:
A Private Little War
TOS episode aired Next episode:
Patterns of Force
Previous story:
first story
Star Trek 9
Next story:
The Ultimate Computer
chronological order
Previous Adventure:
First, Do No Harm
Memory Beta Chronology Next Adventure:
The Order of Things
Pages 15-19
Previous Adventure:
Mutiny on the Enterprise
Pocket Next Adventure:
Patterns of Force
Previous Adventure:
Mutiny on the Enterprise
Voyages of the
USS Enterprise (NCC-1701)
(2264 to 2270)
Next Adventure:
Patterns of Force

External link[]

  • This character was not named in the episode but the same actor, wearing an officer's Starfleet uniform, was addressed as Brent in TOS episode: "The Naked Time". The same actor also played the character of Vinci.
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